ci: added forcetypeassert lint rule (#96)

Author: austinvalle

.golangci.yml

@@ -5,10 +5,10 @@ issues:
 linters:
   disable-all: true
   enable:
-    - deadcode
     - durationcheck
     - errcheck
     - exportloopref
+    - forcetypeassert
     - gofmt
     - gosimple
     - ineffassign
@@ -21,5 +21,5 @@ linters:
     - tenv
     - unconvert
     - unparam
-    - varcheck
+    - unused
     - vet